A new poll shows GOP Rep. Denny Rehberg inching ahead of Sen. Jon Tester in this state's exceedingly tight Senate race, opening up a 4-point lead over the Democratic incumbent with just two days until polls close.

GOP Rep. Denny Rehberg is going up with a new ad in the Montana Senate race to push back on a barrage of Democratic attacks casting him as a foe of firefighters. The Rehberg ad, which was shared early with POLITICO, casts the Democratic ads as “more desperate, false attacks from Jon Tester.”